Fire-plow



(No Model.) '2' Sheefis.--Sheet 1. J. B. OLIVER.

- FIRE PLO Patented June 14, 1887.

Witnesses.

' T ctZZ whom it may concern:

' vided with my improvement.

UNITED STATES PATENT OFFICE.

JAMES B. OLIVER, OF PITTSBURG, PENNSYLVANIA.

FIRE-PLOW.

SPECIFICATION forming part of Letters Patent No. 364,768, dated June 14,1887.

Application filed December 23, 1886. Sclial No. 222,370. (No model.)

Be it known that I, JAMES B. OLIVER, of Plttsburg, ill the county ofAllegheny and State of Pennsylvania, have invented a-new and usefulImprovement in Fire-Flows; andI do hereby declare the following to be afull, clear, and exact description thereof.

My invention relates particularly to that class of plows commonly knownas fireplows, used ill certain soils of ,a sticky nature, whlehexperience has demonstrated will not adhere to the surface of themold-board if the latter is in a heated condition. The formerconstruction was to have a fire-chamber with a grate, in which solidfuel was used, attached to the mold-board. This construction, however,while effective for the purpose, was

troublesome and defective, owing to the in- To enable others skilled inthe at to make and use my improvement, I will now describe it byreference to the accompanying two sheets of drawings, ill which- Figure1 is a side elevation of a plow pro- Fig. 2 is a plan View of the same.Fig. 3 is all enlarged plan view partly in section. Fig. 4 is a sideview of Fig. 3 partly ill section. Fig. 5 is a plan view of thevapor-burner. Fig. 6 is a vertical longitudinal section of the same.

Like letters of reference indicate like parts in each.

The plow with which I have illustrated my improvement is of a commonwell known form, having a mold -board, a, standard I), beam 0, handlesd, and share 6. Secured to the mold-board a, and immediately ill therear of the same, or to any other part of the plow by which it may besupported in that position, is a box or chamber, f. In the chamber f isa suitable vapor-burner, g, which supplies the heat necessary forheating themold-board up to the proper temperature to prevent theadhesion thereto of the sticky soil with which the plow is designed tobe used. The vaporburner g is connected with and receives the oil orother combustible liquid with which it is supplied from a tank orholder, h, by means of a pipe, 2'. The holder h is supported between thehandles of the plow by suitable braces, k, or other fastening andsupporting devices, and it is furnished with a filling-aperture, m,closed by a suitable cap. The pipe 2 leads out of the bottom of theholder through the side of the boxf to the burner g by any desiredcourse or arrangement.

I make no claim to the construction of the burner, as that forms no partof my invention.

The metal burner g, which I show in the drawings, is fitted for use withordinary illuminating petroleum-oil as well as with the lighterdistillates-such as benzine, naphtha, &c.-'and therefore I prefer to useit. It 0011- sists of a horizontal pipe, 1, to which the supply-pipe 13is connected, a disk, 2, secured to the pipe 2', a down-pipe, 3, aburner-opening, 4, an adjusting screw or needle, 5, and a bottom of thedisk 2,1182LtS up the latter and the pipe 1 sufficiently to vaporize theoil. A door, a, is provided in the side of the box f to give access tothe burner for the purpose of regulating it, and the door or sidesof thebox are properly perforated to admit air to support combustion. Thebottom of the box is made with an upward curve or inclination, so as notto interfere with the descent of the plow into the earth, whereby a deepfurrow may be made, as with an ordinary plow.

The burner g generates a steady, constant heat, which may be raised orlowered at pleasure by means of the adjusting-screw 5; No trouble isexperienced ill regard to products or residuum of combustion, as thereis practically no smoke or unconsumed vapor,land no cinders or ashes aremade. The holderis not so large as to have an inconvenient bulk, and isplaced in a position where it is not in the way, alld being tightlyclosed, except the usual small aperture to admit air, so that the liquidwill feed, it is not liable to spill its contents in the ordinary use ofthe plow.

While I have described the use of my improvement with a box or chamberarranged back of the mold-board, I do not desire to limit myselfthereto, as for some purposes and in some localities the burner can beused with good results without the inclosing box or chamber. It should,however, be supported by suitable stcadying-braccs to prevent the shocksand jars occasioned by the movement of the plow from shaking it loosefrom the supply-pipe This last-named construction can be applied toplows now in use without great expense and trouble, whereas it would besomewhat ditlicnlt to apply the chamberf to an old plow.

I am aware that it is not new to apply heat to the mold-board ot' plows,as this has been done by means of a firebox and also by steampipcsleading from a boiler carried on theframe of the plow. By myimprovement, however, the comp] icated devices of the steamheatingapparatus are dispensed with and' a constant source of heat is carriedby the plow without materially increasing the weight or in any wayinterfering with the practical utility of the plow itself, and at thesame time an equal and regulable heat may be imparted to the 1nold-boardwhenever this heat is required.

IVhat I claim as my invention, and desire to secure by Letters Patent,is-

1. As an improvement in fireplows, the combination of the mold-board, avapor-burner attached to the back of the mold-board, and afluid-reservoir communicating with the vaporburner, sul'istantially asand for the purpose specified.

2. A plow provided with a vapor-burner arranged back of theinolt'tboard, a holder for containing oil or other combustible fluidsupported on the frame of the plow, and a pipe connecting the holderwith the burner, substantially as and for the purposes described.

3. A plow provided with a box or chamber arranged back of themold-board, a vaporburner arranged in said chamber, and an oilreceptacleconnected with the vapor-burner by suitable supply-pipes, substantiallyas and for the purposes described.

4t. A plow provided with a heating-chum her back of the mold-board, saidchamber hav in g an upwardly-ineliued bottom, substantially as and forthe purposes described.

In testimony whereof I have hereunto set my

